Molten metal stirring equipment

Details Molten metal stirring equipment Molten metal stirring equipment

1983-04-20

1984-08-07

Rutledge, L. Dewayne

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

By stirring or mixing molten metal

266280, 75 49, C22B 900

Patent

active

044639350

ABSTRACT:
A molten metal stirring apparatus stirs molten metal by sucking the molten metal into a riser linked to a melting furnace beneath the surface of molten metal in the melting furnace, and returning the molten metal in the riser into the melting furnace. The apparatus includes an electric heater for heating the riser and provided in the vicinity of the position reached by the molten metal drawn into the riser. A changeover valve is linked to the upper end of the riser. A vacuum source, for reducing the pressure inside the upper end of the riser, is connected to the changeover valve. A duct, leading exhaust gas from the melting furnace to the upper end of the riser, is connected to the changeover valve. A heater for heating the riser is provided coaxially with and on the outer periphery of the riser.

REFERENCES:
patent: 3606293 (1971-09-01), Endely
patent: 4008884 (1977-02-01), Fitzpatrick et al.
patent: 4235626 (1980-11-01), Semin et al.
patent: 4236917 (1980-12-01), Dolzhenkov et al.
patent: 4328958 (1982-05-01), Dolzhenkov
patent: 4355789 (1982-10-01), Dolzhenkov et al.
"Special Refractories", Henson, American Foundryman, May 1947, pp. 64-70.

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